Model aircraft



FIG. 1 is a front perspective view of a model aircraft showing my new design;

FIG. 2 is a back perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a left side view thereof; and,

FIG. 8 is a right side view thereof.

The broken lines are included for the purpose of illustrating portions of the model aircraft that form no part of the claimed design. 

The ornamental design for a model aircraft, as shown and described. 